CN103199903A - Bluetooth audio receiver with interface shared by charging and audio - Google Patents

Bluetooth audio receiver with interface shared by charging and audio Download PDF

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Publication number
CN103199903A
CN103199903A CN2013100533139A CN201310053313A CN103199903A CN 103199903 A CN103199903 A CN 103199903A CN 2013100533139 A CN2013100533139 A CN 2013100533139A CN 201310053313 A CN201310053313 A CN 201310053313A CN 103199903 A CN103199903 A CN 103199903A
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China
Prior art keywords
audio
audio frequency
bluetooth
charging
pin
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CN2013100533139A
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Chinese (zh)
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CN103199903B (en
Inventor
张志明
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ZHEJIANG COMPUPAL CORP
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ZHEJIANG COMPUPAL CORP
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Priority to CN201310053313.9A priority Critical patent/CN103199903B/en
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Abstract

The invention discloses a bluetooth audio receiver with an interface shared by charging and audio. The bluetooth audio receiver with the interface shared by the charging and the audio comprises a bluetooth main control chip, an operational amplifier chip used for converting difference audio signals to stereo signals and four audio female seats matched with a headset plug or a power line plug. The bluetooth main control chip comprises a charging port and two audio output ports. The two audio output ports of the bluetooth main control chip are respectively in electric connection with the operational amplifier chip. Two stereo output ports of the operational amplifier chip are respectively in electric connection with a third pin and a forth pin of the audio female seats. A second pin of the audio female seats is connected with the ground. The charging port is in electric connection with a first pin of the audio female seats. The bluetooth audio receiver with the interface shared by the charging and the audio has the interface shard by the charging and the audio and has the advantages of being small in size, light in weight, convenient to carry, convenient to use, low in price, good in anti-disturbance performance, capable of achieving the function of static electricity elimination and good in safety performance.

Description

Bluetooth audio frequency receiver with charging, audio frequency shared interface
Technical field
The present invention relates to the sound technique field, relate in particular to a kind of Bluetooth audio frequency receiver with charging, audio frequency shared interface.
Background technology
Bluetooth earphone is that Bluetooth technology is applied on the hands-free headsets, allows the user can exempt impeding of irritating electric wire, the earphone of easily conversing in every way in comfortable ground.
Normally used bluetooth earphone comprises Bluetooth audio frequency receiver and the earphone that is connected with receiver; The Bluetooth audio frequency receiver comprises parts such as Bluetooth chip, circuit board, battery, cradle and antenna, and the audio interface on the Bluetooth audio frequency receiver and charging inlet independently arrange.
Therefore, normally used Bluetooth audio frequency receiver has that volume is big, Heavy Weight, carries inconvenience, expensive characteristics.
Chinese patent mandate publication number CN201365242Y authorizes disclose a kind of Bluetooth audio frequency receiver open day on December 16th, 2009, comprises Bluetooth antenna, bluetooth receiver module, control interface module and power module; Described Bluetooth antenna links to each other with the radio frequency receiving terminal of bluetooth receiver module; Described interface control module links to each other with audio signal output end with the control end of bluetooth receiver module respectively; Described power module links to each other with the power end of bluetooth receiver module with the control interface module respectively, also comprise the bluetooth sending module, the radio frequency transmitting terminal of described bluetooth sending module links to each other with described Bluetooth antenna, control end links to each other with described control interface module with audio signal input end, and power end links to each other with described power module.The Bluetooth audio frequency receiver of this utility model has the shortcoming that audio frequency and charging inlet can not share.
Summary of the invention
The present invention is the deficiency that can not share for the audio frequency that overcomes Bluetooth audio frequency receiver of the prior art and charging inlet, and a kind of Bluetooth audio frequency receiver with charging, audio frequency shared interface is provided.
To achieve these goals, the present invention is by the following technical solutions:
A kind of Bluetooth audio frequency receiver with charging, audio frequency shared interface comprises the bluetooth main control chip, is used for the difference audio signal is converted to the amplifier chip of stereophonic signal, the 4 section audio female seats that match with headset plug or power-line plug; Described bluetooth main control chip comprises charging port and two audio output ports; Two audio output ports of described Bluetooth chip are electrically connected with the amplifier chip respectively, and two stereo output ports of amplifier chip are electrically connected with the 3rd pin, the 4th pin of audio frequency female seat respectively, the second pin ground connection of audio frequency female seat; Charging port is electrically connected with first pin of audio frequency female seat.
The charging port of the bluetooth main control chip of Bluetooth audio frequency receiver of the present invention is electrically connected with first pin of audio frequency female seat, and two audio output ports of Bluetooth chip are electrically connected with the amplifier chip respectively, two stereo output ports of amplifier chip are electrically connected with the 3rd pin, the 4th pin of audio frequency female seat respectively, the second pin ground connection of audio frequency female seat; Behind the power line that 4 section audio female seats are inserted with power supply is connected, namely realize charge function; Power line is extracted from 4 section audio female seats, when 4 section audio female seats are inserted earphone, realized audio-frequency function.
Have only the 4 section audio female seats of use, and adopt above-mentioned connected mode just can make the audio frequency female seat realize charging, audio frequency common functions.
The course of work of Bluetooth audio frequency receiver of the present invention is as follows:
The bluetooth main control chip receives wireless signal, converts wireless signal to the difference audio signal; The difference audio signal is input in the amplifier chip by two audio output ports of bluetooth main control chip, the amplifier chip converts the difference audio signal to stereophonic signal, and stereophonic signal outputs to the 3rd pin, the 4th pin of audio frequency female seat by two stereo output ports of amplifier chip; The second pin ground connection of audio frequency female seat, charging port is electrically connected with first pin of audio frequency female seat;
When being connected to the USB interface that is connected with power supply on the audio frequency female seat, the charging port of bluetooth main control chip is by first pin and the power connection of audio frequency female seat, and the ground of charging port sharing audio female seat second pin, power supply are that the Bluetooth audio frequency receiver charges;
The USB interface that is connected with power supply is extracted, when inserting headset plug on the audio frequency female seat, stereophonic signal is transferred in the earphone by the 3rd pin, the 4th pin of audio frequency female seat, and the receiver of earphone converts stereophonic signal to voice signal and spreads out of, thereby realizes audio-frequency function.
Bluetooth audio frequency receiver of the present invention adopts the circuit connecting mode of original creation, have charging, audio frequency shared interface, thereby significantly dwindled the volume of Bluetooth audio frequency receiver, do not needed to dispose charging inlet in addition, had little, in light weight, easy to carry, the low-cost characteristics of volume.
As preferably, also comprise diode, diode cathode is electrically connected with charging port, diode cathode ground connection.
Diode is used for eliminating electrostatic interference, avoids static scaling loss bluetooth main control chip, the fail safe that has improved the Bluetooth audio frequency receiver.
As preferably, the 3rd pin and the 4th pin of audio frequency female seat are electrically connected with filter circuit respectively, and described filter circuit comprises the filter capacitor that several are parallel with one another.Filter circuit is used for the radio frequency interference of filtering GSM or CDMA, and air interference such as Wifi.
As preferably, described filter capacitor is 3, be respectively first filter capacitor that disturbs for filtering 1.8GHz-2GHz frequency band signals, be used for second filter capacitor that filtering 800MHz and 900MHz signal disturb, be used for the 3rd filter capacitor that the above high-frequency signal of filtering 2GHz disturbs.
As preferably, first filter capacitor is 10pF-18pF, and second filter capacitor is 27pF-47pF, and the 3rd filter capacitor is 5pF-12pF.
First filter capacitor is used for the 1.8GHz-2GHz interference signal of filtering 2G and 3G, and second filter capacitor is used for the 800MHz of filtering CMDA and the 900MHz interference signal of GSM, and the 3rd filter capacitor is used for filtering high frequency 2.4G to be disturbed.
As preferably, the bluetooth main control chip is CSR 8 chips, Broadcom 2044, Broadcom 2045 or Broadcom 2074 chips.
As preferably, the amplifier chip is TPA6132 amplifier chip.
As preferably, 4 section audio female seats are PJ-392B type 4 section audio female seats.
Therefore, the present invention has following beneficial effect: (1) has charging, audio frequency shared interface; (2) little, in light weight, easy to carry, easy to use, the low price of volume; (3) good in anti-interference performance; (4) have static and eliminate function, security performance is good.
Description of drawings
Fig. 1 is a kind of theory diagram of the present invention.
Among the figure: bluetooth main control chip 1, amplifier chip 2, audio frequency female seat 3, charging port 4, audio output port 5, stereo output port 6, the 3rd pin 7, the 4th pin 8, second pin 9, first pin 10, the first filter capacitor C 1, the second filter capacitor C 2, the 3rd filter capacitor C 3
Embodiment
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment as shown in Figure 1 is a kind of Bluetooth audio frequency receiver with charging, audio frequency shared interface, comprises bluetooth main control chip 1, is used for the difference audio signal is converted to the amplifier chip 2 of stereophonic signal, the 4 section audio female seats 3 that match with headset plug or power-line plug; The bluetooth main control chip comprises charging port 4 and two audio output ports 5; Two audio output ports of two audio output ports of Bluetooth chip are electrically connected with the amplifier chip respectively, the amplifier chip is provided with two stereo output ports 6, be respectively left audio output port and right audio output port, left side audio output port is electrically connected with the 4th pin 8 of audio frequency female seat, right audio output port is electrically connected the second pin ground connection of audio frequency female seat with the 3rd pin 7 of audio frequency female seat; Charging port is electrically connected with first pin 10 of audio frequency female seat.
Also comprise diode, diode cathode is electrically connected with charging port, diode cathode ground connection.
The 3rd pin and the 4th pin of audio frequency female seat are electrically connected with filter circuit respectively, and described filter circuit comprises 3 filter capacitors parallel with one another.
3 filter capacitors are respectively the first filter capacitor C that disturbs for filtering 1.8GHz-2GHz frequency band signals 1, be used for the second filter capacitor C that filtering 800MHz and 900MHz signal disturb 2, be used for the 3rd filter capacitor C that the above high-frequency signal of filtering 2GHz disturbs 3
First filter capacitor is 18pF, and second filter capacitor is 27pF, and the 3rd filter capacitor is 12pF.
The bluetooth main control chip is Broadcom 2044 chips.The amplifier chip is TPA6132 amplifier chip.4 section audio female seats are PJ-392B type 4 section audio female seats.
The course of work of Bluetooth audio frequency receiver of the present invention is as follows:
The bluetooth main control chip receives wireless signal, converts wireless signal to the difference audio signal; The difference audio signal is input in the amplifier chip by two audio output ports of bluetooth main control chip, the amplifier chip converts the difference audio signal to stereophonic signal, and stereophonic signal outputs to the 3rd pin, the 4th pin of audio frequency female seat by two stereo output ports of amplifier chip; The second pin ground connection of audio frequency female seat, charging port is electrically connected with first pin of audio frequency female seat;
When being connected to the USB interface that is connected with power supply on the audio frequency female seat, the charging port of bluetooth main control chip is by first pin and the power connection of audio frequency female seat, and the ground of charging port sharing audio female seat second pin, power supply are that the Bluetooth audio frequency receiver charges;
The USB interface that is connected with power supply is extracted, when inserting headset plug on the audio frequency female seat, stereophonic signal is transferred in the earphone by the 3rd pin, the 4th pin of audio frequency female seat, and the receiver of earphone converts stereophonic signal to voice signal and spreads out of, thereby realizes audio-frequency function.
Diode is eliminated electrostatic interference, avoids static scaling loss bluetooth main control chip, and the fail safe of Bluetooth audio frequency receiver is good.First, second, third filter capacitor of filter circuit respectively filtering the 1.8GHz-2GHz interference signal of 2G and 3G, the 900MHz interference signal of the 800MHz of CMDA and GSM, high frequency 2.4G disturbs; Thereby improved the tonequality of the voice signal of listening to.
Should be understood that present embodiment only to be used for explanation the present invention and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

Claims (8)

1. Bluetooth audio frequency receiver with charging, audio frequency shared interface, it is characterized in that, comprise bluetooth main control chip (1), be used for the difference audio signal is converted to the amplifier chip (2) of stereophonic signal, the 4 section audio female seats (3) that match with headset plug or power-line plug; Described bluetooth main control chip comprises charging port (4) and two audio output ports (5); Two audio output ports of described Bluetooth chip are electrically connected with the amplifier chip respectively, and two stereo output ports (6) of amplifier chip are electrically connected with the 3rd pin (7), the 4th pin (8) of audio frequency female seat respectively, the second pin ground connection of audio frequency female seat; Charging port is electrically connected with first pin (10) of audio frequency female seat.
2. the Bluetooth audio frequency receiver with charging, audio frequency shared interface according to claim 1 is characterized in that, also comprise diode, diode cathode is electrically connected with charging port, diode cathode ground connection.
3. the Bluetooth audio frequency receiver with charging, audio frequency shared interface according to claim 1, it is characterized in that, the 3rd pin and the 4th pin of audio frequency female seat are electrically connected with filter circuit respectively, and described filter circuit comprises the filter capacitor that several are parallel with one another.
4. the Bluetooth audio frequency receiver with charging, audio frequency shared interface according to claim 3 is characterized in that described filter capacitor is 3, is respectively the first filter capacitor (C that disturbs for filtering 1.8GHz-2GHz frequency band signals 1), be used for the second filter capacitor (C that filtering 800MHz and 900MHz signal disturb 2), be used for the 3rd filter capacitor (C that the above high-frequency signal of filtering 2GHz disturbs 3).
5. the Bluetooth audio frequency receiver with charging, audio frequency shared interface according to claim 4 is characterized in that, first filter capacitor is 10pF-18pF, and second filter capacitor is 27pF-47pF, and the 3rd filter capacitor is 5pF-12pF.
6. according to claim 1 or 2 or 3 or 4 or 5 described Bluetooth audio frequency receivers with charging, audio frequency shared interface, it is characterized in that the bluetooth main control chip is CSR 8 chips, Broadcom 2044, Broadcom 2045 or Broadcom 2074 chips.
7. according to claim 1 or 2 or 3 or 4 or 5 described Bluetooth audio frequency receivers with charging, audio frequency shared interface, it is characterized in that the amplifier chip is TPA6132 amplifier chip.
8. according to claim 1 or 2 or 3 or 4 or 5 described Bluetooth audio frequency receivers with charging, audio frequency shared interface, it is characterized in that 4 section audio female seats are PJ-392B type 4 section audio female seats.
CN201310053313.9A 2013-02-19 2013-02-19 There is the Bluetooth audio receiver of charging, audio frequency shared interface Active CN103199903B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310053313.9A CN103199903B (en) 2013-02-19 2013-02-19 There is the Bluetooth audio receiver of charging, audio frequency shared interface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310053313.9A CN103199903B (en) 2013-02-19 2013-02-19 There is the Bluetooth audio receiver of charging, audio frequency shared interface

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CN103199903B CN103199903B (en) 2016-07-06

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200953648Y (en) * 2006-02-20 2007-09-26 深圳市浦诺菲电讯有限公司 Charging and audio shared interface bluetooth earphone
CN201590889U (en) * 2009-12-25 2010-09-22 歌尔声学股份有限公司 Stereosonic bluetooth headset
CN203166889U (en) * 2013-02-19 2013-08-28 浙江恒科实业有限公司 Bluetooth audio receiver having charging and audio frequency sharing interface

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200953648Y (en) * 2006-02-20 2007-09-26 深圳市浦诺菲电讯有限公司 Charging and audio shared interface bluetooth earphone
CN201590889U (en) * 2009-12-25 2010-09-22 歌尔声学股份有限公司 Stereosonic bluetooth headset
CN203166889U (en) * 2013-02-19 2013-08-28 浙江恒科实业有限公司 Bluetooth audio receiver having charging and audio frequency sharing interface

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